01/30/2025
The Western Monarch Population is tracked by a COUNT of Butterflies. The results are in....
The annual Western Monarch Count in California revealed the second-lowest population since counting began in 1997, with just over 9,000 monarchs recorded.
This is higher than the lowest record ever of less than 2,000 monarchs in 2020, but significantly lower than the numbers over the past three years, all of which exceeded 200,000 monarchs.
Of the more than 250 sites monitored by hundreds of volunteers, Lighthouse Field State Park and Natural Bridges State Park in Santa Cruz County had the most monarchs, with about 1,400 each.
The western monarch population is separate from the population that migrates to central Mexico each winter, with the Rocky Mountains separating the two.
Photo: Isis Howard, Xerces Society